It is about nose jobs (rhinoplasty) in Iran, which statistically has the most of any country.
[1] The documentary employs a semi-comedic tone, with the title referencing the earlier film Divorce, Iranian Style.
[2] Nose, Iranian Style relates the trend to politics, with it and the 2007 documentary Tehran: 11 pm connecting it to the importance of appearance, given the taboo of men and women directly and socially interacting.
[4] Variety critic Deborah Young positively reviewed Nose, Iranian Style as "A surprising, compulsively watchable documentary.
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